Molding-machine.



w Z '/4 g 4%3 ATTORNEY H. MAOKAY.

I MOLDING MACHINE.

APPLICATION FILED our. 16, 1911.

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' n ll INVENTOR COLUMBIA PLANOGRAPH 60., WASHINGTON, D. C.

, H; MAOKAY. I MOLDING MACHINE.

Patented Apr. 2, 1912.

2 SHEETS-SHEET 2.

v v 4 5 i j M WITNESSES: 2 25 -27 I [wavy/2 E. 1 l 00f 5- 2 1- A TTOR/VEY HUGH MAOKAY, 01? DALLAS, TEXAS.

MOLDING-MACHINE.

Specification of Letters Patent.

- Patented Apr. 2, 1912.

Application filed October 16, 1911. Serial No. 654,825.

To all whom it may concern:

7 Be it known that I, HUGH MAcKAY, a citizen of the United States,residing at Dallas, in the county of Dallas and State of Texas, haveinvented certain new and useful Improvements in Molding-Machines, ofwhich the following is a specification.

This invention relates to molding machines and particularly to machinesfor forming molds for casting.

The object of the invention is to provide a machine having oppositelymovable mold frames mounted above and below a laterally movable patternsupport, each frame having its walls integral and without joints.

Among other features are the provision, of a molding plunger and apressure cylinder for raising and lowering the same; a mold raisingplunger for raising the completed mold from the frame and a pressurecylinder for operating said plunger; mechanism for raising and loweringthe lower frame; means for fastening the upper frame against upwardmovement when the mold is removed; and devices arranged to connect themolding plunger and the upper frame when it is desired to raise the sameor to be thrown out of operation when it is de-'- to getout of workingorder.

With the above and other objects in view the invention has relation tocertain novel features of construction and operation, an example ofwhich is described in the following specification and illustrated in theaccompanying drawings, wherein:

Figure 1 is a vertical sectional view on the line ss of Fig. 2 withcertain parts partially in section and partially in elevation. Fig. 2 isa horizontal cross sectional view on the line mm of Fig. 1, and Fig. 3isa partial end elevation.

In the drawings the numeral 1 designates a base plate on which alongitudinal base member 2 is provided. At each end of the base membervertical cylindrical standards 3 are mounted. These standards areconnected at their upper endsby a longitudinal crosshead 4: securedthereon. Between the standards a lower molding frame 5 and an uppermolding frame 6 are provided.

These frames are shaped substantially the same as the members of anordinary flask except that they are not hinged. At each side the framehas at its lower portion an ear 7. The frame 6 has similar ears 8projecting from its sides at the upper portion. These ears embrace thestandards whose surfaces are smooth so as to permit the ears to slidefreely thereon.

On one of the standards between the ears 7 and 8 a collar .9 isadjustably fastened and supports a collar 10 arranged to be rotatedabout the standard. The collar 10 has a curved flange 11 reduced inthickness and receives a correspondingly shaped flange 12 provided atoneside of a pattern support or plate 14 disposed horizontally of themachine. The said flanges are secured together by screws 15. By thisarrangement the pattern support may be disconnected from the collar 10and other supports substituted. On the other standard collars 16 and 17are adjustably secured while-the adjacent end of the pattern support hasan integral hook 18 adapted to engage about said standard as is bestshown in Fig. 2. The collar 16 is horizontally alined with the collar 9and supports the-hook. The collar 17 has its upper surface in horizontalalinement with the upper surface of the collar 10, said 001- larsforming stops and limiting the downward movement of the upper frame 6when the pattern support is swung from between the frames. 7 v

As shown in the drawings the pattern support. fits between the frames 5and G and the latter contacts therewith. Patterns A and B are suitablyfastened to the upper and under sides of said support so as to projectinto the frames in proper position. It is apparent that various patternsmay besecured to the support and other supports having patterns thereonmay be substituted by removing the screws 15. a g

It is apparent that before the pattern support can be swung laterallyand thus withdrawn from between vthe frames, the

lower frame 5 must be lowered and the up 22 which latter extend forwardand incline upward from arock shaft 23 on which they are fixed. Thisshaft is mounted in bearings 24 at the rear of the base plate 1.

By rocking the shaft 23 the arms are swung and the links raised andlowered and in this way the frame 5 is raised and lowcred. For rockingthe shaft a lever 25 is provided and pivoted on a bracket 26 secured toone of the standards. This lever has a portion 27 extending rearwardlyat an angle thereto and terminating in a boss 28. An arm 29 fixed on theend of the shaft 23 has its outer end rounded and bearing on the boss.\Vhen the lever 25 is swung forward the portion 27 will be swung upwardand through its boss swing the arm 29 upward thereby rocking the shaft23. This movement will raise the frame 5. lVhen the lever 25 is swunginward the portion 27 will be swung downward and the frame 5 will loweritself by its own weight thereby returning the parts to the firstposition.

At the center of the cross head 4 a pressure cylinder 30 is mounted andextends upward. A suitable valve 31 is supported adjacent the cylinderand is provided with branch pipes 32 leading the upper and lower ends ofthe cylinder and is also provided with an outlet or exhaust pipe 33.This valve is of ordinary construction and forms no particular part ofthe invention. A plunger head 34 is mounted in the cylinder and securedon the upper end of a plunger rod 35 which passes down through the crosshead. On the lower end of the plunger rod a molding head 36 is secured.The molding head is of such size as to pass into the frame 6 but notentirely through the same.

It is obvious that when fluid under pressure is admitted to lower end ofthe cylinder 30 below the plunger head, the plunger will be elevated andwhen said fluid is admitted to the cylinder over the plunger head theplunger will be forced downward. When it is desired to elevate the frame6 the plunger is lowered so that the head 36 will project into saidframe. Latches 37 pivoted on the ears 8 and normally out of the path ofthe head 36 are swung over said head so that when the plunger iselevated, the frame 6 will be elevated as shown in dotted lines in Fig.1.

For supporting the mold a pallet 38 is provided for each mold. At thebottom of the frame 5 an inwardly directed flange 39 is provided andforms a support for the pallet. As in the ordinary flask the frames 5and 6 are flared upward and the pallet may be elevated through bothframes when it is desired to remove the mold. For elevating the pallet araising or elevating plunger is provided. This plunger comprises asupport 40 fixed on the upper end of a plunger rod 41 which carries atits lower end, a plunger head 42 working in a pressure cylinder 43mounted on the base member 2. For controlling the supply of fluid to thecylinder a suitable valve 44 is mounted on the base 1 and has connectionwith the lower end of the cylinder by means of a pipe 45. Fluid issupplied to the valve by a pipe 46 and exhausted therefrom by a pipe 47The operation is as follows: Assuming that the frame 5 is lowered andthe frame 6 elevated as shown in dotted lines in Fig. 1 and the patternsupport 14 swung to one side as shown in dotted lines in Figs. 1 and 2,the machine is ready to receive the molding sand. The pallet 38 havingbeen placed in the frame 5, sand is then deposited in said frame in therequired quantity. The proper patterns A and B having been secured tothe support 14 the latter is swung into position. The valve 31 is thenoperated to lower the molding plunger which carries the head 36 andwhereby the frame 6 is lowered on to the pattern support. The latches 37are swung out of the path of the head 36 and the latter elevated. Theframe 5 is now raised by swinging the lever 25 and the pattern B forcedinto the sand. After this is accomplished sand is placed in the frame 6and the molding head 36 lowered to compress the sand about the patternA, a plug 48 having first been placed on the pattern A. It will be notedthat there is a small space between the collars 16 and 17 and should thepattern support be raised when the lever 25 is swung to raise the frame5 and the pattern B not being entirely forced into the sand, it will beunderstood that when pressure is applied by the head 36 both frames willbe forced in contact with the pattern support and the patterns properlyembedded in the sand. After the mold has been formed the frame 5 isagain lowered, the latches 37 are again swung over the head 36 and theframe 6 elevated. The two halves of the mold are thus separated and thepattern support is free to be swung to one side and thus withdrawn. Thenext step is to lower the frame 6 and then raise the frame 5 so thatsaid frames are in contact. The latches 37 are thrown back and hooks 49mounted on the frame 5 are swung up and engaged over pms 5O projectingfrom the frame 6 there by locking the frame together and fastening theframe 6 against movement upward. The head 36 is then raised. The mold isnow ready to be removed. The valve 44 is operated to supply fluid underpressure to the cylinder 43 whereby the plunger head 42 is elevated.This brings the support 40 into engagement with the pallet 38 andcontinued upward movement of the plunger elevates the pallet and moldthrough the frame until said pallet is above the frame 6 when the moldand pallet may be removed from the machine. The plunger head 42 is thenlowered and the machine is in position for forming another mold.

What I claim, is:

1. In a molding machine, a pair of standards, upper and lower moldframes disposed between the standards and slidable thereon, a moldingplunger over the upper frame, a molding head mounted on the plunger, andlatches carried by the upper frame arranged to be swung into the path ofthe molding head.

2. In a molding machine, a pair of vertical standards, upper and lowermold frames slidable on the standards, a horizontal pattern supporthinged on one of the standards and provided with a hook engaging theother standard, patterns mounted on the upper and lower sides of thepattern support, an internal flange provided at the bottom of the lowerframe, a pallet resting on said flange, a pressure cylinder mountedbelow the lower frame between the standards, a raising plunger workingin the cylinder and having a support at its upper end under the pallet,links dependingfrom the lower frame, a rock shaft, arms fixed on therock shaft and pivoted to the links, a lever device for rocking saidshaft, a cross head mounted on the standards, a second pressure cylindermounted on the cross head, a plunger working in the second cylinder andhaving'a rod extending down through the cross head, a molding headmounted on the lower end of the rod of the plunger, and latches carriedon the upper frame arranged to be positioned in the path of the moldinghead.

3. In a molding machine, a pair of vertical standards, upper and lowermold frames slidable on the standards, a pattern support mounted on oneof the standards and arranged to swing between the mold'frames,

therefrom, an upper plunger movable vertically over the upper mold frameand free therefrom, said upper plunger having a head adapted to enterthe upper mold frame, and latches mounted on the upper mold frame andarranged to be swung into the path of the upper plunger above its head.In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HUGH MAoKAY. Witnesses:

CHRISTINA MACKAY, JAoK AQSCHLEY.

Copies of this patent may be obtained for five cents each, by'addressing the Commissioner of Patents,

' Washington, D. G.

